Self-testing nonprojective quantum measurements in prepare-and-measure experiments

Each time a new x bit is applied to the emitter, the FPGA checks if one or more detection events have occurred in the same time window: if one or more photons have been revealed by

We consider a prepare-and-measure scenario with a bound on the Hilbert space dimension and develop methods for (i) robustly self-testing extremal qubit POVMs and (ii) certifying

The objective of this section is to prove that the maximum of accessible information can be reached asymptotically by performing consecutive measurements using an arbitrary qubit

[55], the authors conjecture that for an n-qubit state maximally entangled with respect to their entanglement measure, all single-qubit reduced states are totally mixed.. In

Compared to the fully device-independent model, our scheme requires an extra natural assumption, namely, that the mean number of photons of the signal optical modes is bounded..

To this end, consider a quantum strategy in which Alice prepares the ensemble of states given in Eq (5) and Charlie performs the measurements in Eq (6).. (11) Parameterising the

Our self-testing procedure is based on the observa- tion that for every outcome of Bob, the conditional state shared between Alice and Charlie can be self-tested and, moreover, we

These methods allow one to (i) assess the compatibility of given sets of preparations and measurements with the observed statistics, and (ii) lower-bound the average fidelity